22149561625 has 8 divisors (see below), whose sum is σ = 27642653064. Its totient is φ = 17719649200.

The previous prime is 22149561611. The next prime is 22149561653. The reversal of 22149561625 is 52616594122.

It can be written as a sum of positive squares in 4 ways, for example, as 256512256 + 21893049369 = 16016^2 + 147963^2 .

It is not a de Polignac number, because 22149561625 - 2²¹ = 22147464473 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88598122 + ... + 88598371.

It is an arithmetic number, because the mean of its divisors is an integer number (3455331633).

Almost surely, 2^22149561625 is an apocalyptic number.

22149561625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22149561625 is a deficient number, since it is larger than the sum of its proper divisors (5493091439).

22149561625 is an equidigital number, since it uses as much as digits as its factorization.

22149561625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177196508 (or 177196498 counting only the distinct ones).

The product of its digits is 259200, while the sum is 43.

The spelling of 22149561625 in words is "twenty-two billion, one hundred forty-nine million, five hundred sixty-one thousand, six hundred twenty-five".